Hello Doctor! My Father-in-law had a throat infection 3/4 months back which turned serious now. He started feeling a lump in his throat and his ENT suggested us to consult an Oncologist for a check up. We just consulted an experienced Oncologist and did some tests as per his advice. But, we are shocked to see the reports. It's confirming malignancy fro m an unknown source and stating " poorly differentiated malignancy". My FIL is 80 years old and so, we are very worried. Kindly advise.